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Category HYBRID DRONES

NASA’s 10-engine tiltrotor droneNASA’s ten-engine UAV, dubbed the Greased Lightning (GL-10), recently showed off a slick new trick in the skies over Hampton, Virginia. The drone, which is under development by a team at the Langley Research Center, had already passed its initial hovering tests last August; but that was the easy part. As the long and miserable development of the V-22 Osprey has shown, the real challenge is switching over from hover mode to conventional forward flight without the vehicle falling out of the sky. But on Thursday, NASA’s battery-powered tilt-rotor aircraft successfully did just that.

NASA’s ten-engine UAV, dubbed the Greased Lightning (GL-10), recently showed off a slick new trick in the skies over Hampton, Virginia...